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It is also called the Zaire River.
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The Congo River’s sources are in the mountains and highlands of the East African Rift, as well as Lake Tanganyika and Lake Mweru.
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The Congo River is so powerful that it has the potential to supply all of sub-Saharan Africa's electricity needs. There are about 40 hydroelectric plants on the Congo.
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The main tributaries are the Ubangi, Sangha, and Kasai.
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There are more than 4,000 islands in the river; over fifty are at least ten miles long.
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The river crosses the equator twice.
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The river discharges a volume of water that is second only to the Amazon River.
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The river flows through the Republic of Congo, Zaire, Angola, Zambia,Cameroon, and Tanzania.

Interesting Congo River facts
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It is the second longest river in Africa (the Nile is the longest).
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It is the ninth longest river in the world.
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The Congo River is the deepest river in the world. It reaches depths of over 750 feet (230 meters). In some places the river is 10 miles wide.
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The river gets its name from the ancient Kongo Kingdom which existed near the mouth of the river.
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The river runs through the Congo rainforest which is the second largest rain forest in the world.